🔍 Key Findings

• 2.4 mm LCP with a 1.6 mm IM pin had the highest axial stiffness and yield strength among the tested constructs.
• Axial stiffness was significantly higher in the 2.4 mm LCP + 1.6 mm IM pin group compared to 2.7 mm LCP alone (p = .013).
• No significant difference in torsional stiffness was found among groups.
• 2.4 mm LCP + 1.0 mm pin had the lowest stiffness and failure load, underperforming both other constructs.
• All constructs failed via valgus bending, consistent with clinical observations in feline tibial fractures.
• A 1.6 mm pin (~50% canal fill) resulted in superior construct performance vs. 1.0 mm (~30% fill).
• Group 2 (2.4 LCP + 1.6 mm pin) outperformed the 2.7 mm LCP alone in stiffness, despite using a smaller plate.
• Plate–rod constructs may better preserve periosteal blood supply and support minimally invasive stabilization strategies.

🔍 Key Findings

• FGPP (fluoroscopic-guided percutaneous pinning) resulted in successful healing in 10/13 fractures, with good limb function.
• Complications occurred in 5 of 11 cases, including intra-articular implants, malunion, implant failure/nonunion, and implant migration.
• Cases with delayed surgery (>15 days) or radiographic remodeling were more likely to experience major complications.
• Most fractures (10/13) were classified as Salter-Harris type I with mild displacement.
• Median surgical time was 60 minutes, and no conversions to open surgery were needed.
• Postoperative femoral neck resorption was minimal, suggesting possible benefits of the minimally invasive approach for preserving vascular supply.
• One intra-articular pin led to progressive joint disease and required femoral head ostectomy.
• FGPP appears best suited for acute, minimally displaced fractures in young dogs (<8 months) with planned elective explant to avoid growth disturbance.

🔍 Key Findings Summary

• Study Design: Retrospective study of 100 radiographs using in silico and clinical data
• Mean preoperative TPA: 28.6°, higher in small dogs than large (p = .02)
• Mean planned TPA (in silico): 7.6°, not achieving 5° target (p < .01)
• Median postoperative TPA: 5.5° overall; higher in small dogs (7°) vs large (4.5°) (p = .06)
• Postoperative ostectomy position: More distal than recommended; average = 8.6 mm
• Increased distalization → greater under-correction of TPA (p = .01)
• Most accurate correction occurred when ostectomy was ≤7.5 mm from patellar tendon
• Wedge angle categories (TPA-Pre minus 5–2°) were used based on pre-op TPA

🔍 Key Findings

• 11 dogs, 13 fractures (mostly Salter-Harris type I) were repaired with FGPP using Kirschner wires.
• 10/13 fractures achieved satisfactory healing with good limb function at ~43 days median follow-up.
• Major complications occurred in 5 dogs: intra-articular pin placement, implant migration (2), implant failure with nonunion, and malunion.
• 2 dogs presenting >15 days post-injury with radiographic remodeling were poor candidates → higher risk of nonunion/malunion.
• Preoperative displacement was mostly mild (10/13 fractures); these had better outcomes than chronic or severely displaced cases.
• Median surgical time: 60 minutes (range 45–75), all performed percutaneously without conversion to open.
• Elective pin removal was performed in 5 cases; migration occurred with both short and long cut wires.
• Femoral neck resorption (“apple-coring”) was rare (2/10 healed cases) and thought to be less frequent than after ORIF due to reduced vascular disruption.

🔍 Key Findings

• Spacer pin fixation showed no difference in failure force or stiffness compared to tension band wire (TBW) or 2-pin techniques.
• All constructs failed under loads >1000 N, exceeding estimated peak quadriceps force in dogs during walking (~240 N).
• Patellar ligament failure was the most common mode of failure across all groups (5–8 samples per group).
• Distal tibial crest fractures were seen only in 2-pin and spacer pin groups, not in TBW group, suggesting TBW may protect against crest failure.
• No failures occurred at pin tracts, possibly due to pin placement within patellar ligament footprint.
• Spacer pin technique avoids placing pins through the tuberosity, potentially reducing risks of soft tissue complications like tendinopathy or irritation.
• Use of partial osteotomy with robust distal crest may substitute for TBW without compromising initial mechanical strength.
• Further in vivo or cyclic loading studies are required, as this cadaveric study tested only acute tensile failure.

🔍 Key Findings

Population: 9 dogs underwent revision of osteointegrated acetabular cups after total hip arthroplasty (THA)

Revision Indications:

• 7 luxations (5 ventral, 2 craniodorsal)
• 1 femoral stem fracture
• 1 aseptic stem loosening

Implants:

• 8 BFX cups, 1 Helica; all revised to BFX
• 7/9 required a larger cup than original

Cup removal: Required sectioning with a high-speed burr and modular osteotome; removal fragments extracted

Complications:

• 1 recurrent luxation
• 1 low-grade infection with possible metallic debris-associated osteolysis
• 2 femoral fissures managed intraoperatively

Outcomes:

• Good to excellent function in 6/6 dogs available at median 621 days
• Minimal complications with success in re-osteointegration of new cup

Clinical takeaway: Revision of stable, ingrown cups is feasible and offers an alternative to pelvic osteotomies; typically requires upsizing

🔍 Key Findings

• Dogs with MPL had significantly shallower femoral trochlear grooves compared to controls, based on CT-measured femoral trochlear groove angle (FTGA).
• FTGA >134° in small breeds (SB) and >128° in medium/large breeds (MLB) were associated with MPL and can serve as surgical thresholds for considering trochleoplasty.
• FTA and FTRIA measurements were less reliable, showing lower sensitivity/specificity than FTGA.
• Inter-rater reliability for FTGA was excellent (ICC > 0.9), supporting its use in clinical decision-making.
• FTGA differed significantly between SB and MLB dogs, suggesting anatomical variation influences MPL predisposition.
• Dogs with MPL but with FTGA below threshold may not benefit from trochleoplasty, supporting individualized surgical planning.
• CT provides more precise and reproducible evaluation of trochlear morphology than radiography or ultrasound.
• The study introduces a CT protocol using P25 and P50 reference points for consistent FTGA measurement.

🔍 Key Findings

• Spacer pin fixation showed no difference in failure force or stiffness compared to tension band wire (TBW) or 2-pin techniques.
• All constructs failed under loads >1000 N, exceeding estimated peak quadriceps force in dogs during walking (~240 N).
• Patellar ligament failure was the most common mode of failure across all groups (5–8 samples per group).
• Distal tibial crest fractures were seen only in 2-pin and spacer pin groups, not in TBW group, suggesting TBW may protect against crest failure.
• No failures occurred at pin tracts, possibly due to pin placement within patellar ligament footprint.
• Spacer pin technique avoids placing pins through the tuberosity, potentially reducing risks of soft tissue complications like tendinopathy or irritation.
• Use of partial osteotomy with robust distal crest may substitute for TBW without compromising initial mechanical strength.
• Further in vivo or cyclic loading studies are required, as this cadaveric study tested only acute tensile failure.

🔍 Key Findings

• Both patient-specific and universal guides yielded correction errors <2°, with no statistically significant difference in accuracy.
• Universal guide corrected aLDFA up to 24° and AA up to 20°, addressing multiplanar deformities effectively.
• Patient-specific guides allowed for preoperative simulation, providing more stable pin placement and potentially aiding less-experienced surgeons.
• Universal guide eliminated the need for CT-based customization, reducing time and cost.
• Cadaver and bone model trials showed consistent accuracy, validating both methods in vitro and ex vivo.
• No significant differences in outcome when correcting uniplanar (aLDFA) vs biplanar (aLDFA + AA) deformities.
• Universal guide's fixed size presented limitations in small dogs, potentially requiring multiple size options.
• Universal guide showed potential for standard use, offering repeatable outcomes with minimal prep despite needing precise intraoperative placement.